US3617656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test spectrum recognition circuit for communication link analyzer
Assignee: Collins Radio Co
•
Filing: 1969-09-25
•
Granted: 1971-11-02
•
Expires: 1989-09-25
Abstract
Abstract In a communication link analyzer including a test signal generator for generating a frequency spectrum and a signal analysis unit for receiving said spectrum through a communication link, a signal recognition circuit is provided to recognize the presence of said spectrum. Tone channels and noise sampling channels are monitored, summed and compared by the signal recognition circuit.
Inventors
- 👤 William S Elliott
- 👤 Ronald F Palmer
- 👤 Robert H Pool
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:02
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/46; H04M; H04M3/00; H04M3/22; H04M3/26; H04M3/28; H04M3/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
Means for indicating the presence of a spectrum of discrete frequencies of electrical signals in a communication link comprising first summing means receiving signals on said link at the discrete frequencies of said spectrum and producing a first output signal analogous to the sum of said signals, second summing means receiving signals on said link at frequencies intermediate pairs of adjacent discrete frequencies of said spectrum and producing a second output signal analogous to the sum of said signals, and first comparison means for receiving and comparing said first and second output signals and producing a third output signal indicative of said comparison.
Claim 2
Dependent Claim
103 words
Means for indicating the presence of a spectrum of discrete frequencies of electrical signals in a communication link comprising first summing means receiving signals on said link at the discrete frequencies of said spectrum and producing a first output signal analogous to the sum of said signals, second summing means receiving signals on said link at frequencies intermediate pairs of adjacent discrete frequencies of said spectrum and producing a second output signal analogous to the sum of said signals, and first comparison means for receiving and comparing said first and second output signals and producing a third output signal indicative of said comparison.
Claim 3
Dependent Claim
51 words
Means in accordance with claim 1 and further including second comparison means for receiving and comparing a plurality of signals at said discrete frequencies of said spectrum and producing a fourth output signal indicative of said comparison, and gate means for receiving said third output signal and said fourth output signal.
Claim 4
Dependent Claim
55 words
Means in accordance with claim 1 and further including a plurality of threshold detectors each connected to receive a signal in said spectrum, first gate means for receiving the outputs of said threshold detectors, and second gate means for receiving the output of said first comparison means and the output of said first gate means.
Claim 5
Dependent Claim
106 words
In a communication link analyzer including a test signal generator for concurrently generating a spectrum of discrete frequencies of electrical signals and a signal analysis unit for receiving said spectrum through a communication link, means in said signal analysis unit for recognizing the presence of said spectrum comprising first summing means receiving signals at the frequencies of said spectrum and producing a first output signal as a function of the sum of said signals, means for producing a reference voltage, and first comparison means for receiving and comparing said first output voltage and said reference voltage and producing a second output signal indicative of said comparison.
Claim 6
Dependent Claim
106 words
In a communication link analyzer including a test signal generator for concurrently generating a spectrum of discrete frequencies of electrical signals and a signal analysis unit for receiving said spectrum through a communication link, means in said signal analysis unit for recognizing the presence of said spectrum comprising first summing means receiving signals at the frequencies of said spectrum and producing a first output signal as a function of the sum of said signals, means for producing a reference voltage, and first comparison means for receiving and comparing said first output voltage and said reference voltage and producing a second output signal indicative of said comparison.
Claim 7
Dependent Claim
93 words
In a communication link analyzer including a test signal generator for generating a frequency spectrum of electrical signals and a signal analysis unit for receiving said spectrum through a communication link, means in said signal analysis unit for recognizing the presence of said spectrum as defined by claim 4 wherein said means for producing a reference voltage includes second summing means receiving signals at frequencies intermediate pairs of adjacent discrete frequencies of said spectrum and producing as a reference voltage a third output signal as a function of the sum of said signals.
Claim 8
Dependent Claim
94 words
In a communication link analyzer including a test signal generator for generating a frequency spectrum of electrical signals and a signal analysis unit for receiving said spectrum through a communication link, means in said signal analysis unit for recognizing the presence of said spectrum as defined by claim 4 and further including second comparison means for receiving and comparing a plurality of signals at said discrete frequencies of said spectrum and producing a fourth output signal indicative of said comparison, and gate means for receiving said second output signal and said fourth output signal.
Claim 9
Dependent Claim
113 words
In a communication link analyzer including a test signal generator for generating a frequency spectrum of electrical signals and a signal analysis unit for receiving said spectrum through a communication link, means in said signal analysis unit for recognizing the presence of said spectrum as defined by claim 6 and further including third comparison means for receiving and comparing a signal from said signal analysis unit indicative of locked loop between said test signal generator and said signal analysis unit through a communication link and a reference signal, said third comparison means generating a fifth output signal indicative of locked loop, and gate means for receiving said second, fourth, and fifth output signals.
Claim 10
Dependent Claim
98 words
In a communication link analyzer including a test signal generator for generating a frequency spectrum of electrical signals and a signal analysis unit for receiving said spectrum through a communication link, means in said signal analysis unit for recognizing the presence of said spectrum as defined by claim 4 and further including a plurality of threshold detectors each connected to receive a signal in said spectrum, first gate means for receiving the outputs of said threshold detectors, and second gate means for receiving the output of said first comparison means and the output of said first gate means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |